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Financial Risk Management Objectives and Policies - Equity Price Risk Sensitivity Analysis Assuming 10% Increase/(Decrease) in Underlying Prices (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2017 CNY (¥)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 CNY (¥)
Equity price risk [Member]
Disclosure of nature and extent of risks arising from financial instruments [Line Items]
Effect on profit before tax	¥ 2,471	$ 390	¥ 1,218

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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X

- Definition

The amount of risk exposure associated with financial instruments with a shared characteristic that identifies a concentration of risks. [Refer: Financial instruments, class [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2016-01-13
-Paragraph B8
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2016-03-30&anchor=para_B8_c&doctype=Appendix&seq=2
-URIDate 2016-03-31

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